Threshing-machine.



Patented mar. 27,1900.

& N m mA M G m AF. R H T 9% 7 5 4 6 0 N (Application filed Apr. 26,1899.) (No Model.)

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IN VE N T OR A lloruey WITNESSES UNITED STATES.

PATENT OFFICE. I

ABRAHAM E. PRICE, OF WAYNESBOROUGH, PENNSYLVANIA.

THRESHlNG-MACHINE.

SPECIFIGATION forming part of Letters Patent No. 645,972, dated March27, 1900.

Application filed April 26, 1899- To all whom it may concern:

Be it known that I, ABRAHAM E. PRICE, a citizen of the United States,residing at Waynesborough, in. the county of Franklin and State ofPennsylvania,have invented certain new and useful Improvements inThresl1- ing-Machines; and I do hereby declare the following to be afull, clear, and exact descrip tion of the invention,such as will enableothers skilled in the art to which it appertains to make and use thesame. 7

This invention relates to threshirigmachines; and it consists in thenovel construction and combination of the parts hereinafter fullydescribed and claimed.

In the drawings, Figure l is a sectional side view of athreshing-cylinder and concave provided with improvements according tothis invention. Fig. 2 is a front end view of the front bar of theconcave and its bearers, showing the retarding-teeth. Fig. 3 is a Viewsimilar to Fig. l, but showing a modification.

A is a portion of the casing of the machine.

B is the threshing-cylinder, provided with threshing-teeth b and mountedon the driving-shaft b.

O is the concave, having bars 0, carried by bearers D and provided withthreshing-teeth d. The concave may be fixed in its relation to thecylinder; but it is preferably adjustable, and any approved mechanismmay be used for adjusting it, such as eccentrics E and bars e, attachedto the rear end portions of the bearers, the front end portions eitherbeing pivoted on pins 6 or also adjusted by means of eccentrics.

O are the distance-bars of the concave.

F is the downwardly and rearwardly inclined feedboard, and f is a gratebetween the lower end of the feed-board and the concave.

All the above-mentioned approved construction.

In the operation of threshing the grain slides down the feed board andgrate in bunches and is seized by the teeth of the cylinder and draggedforcibly between the teeth of the concave. In order to prevent the teethof the cylinder from dragging in too much grain at once and to insurethe grain being drawn in gradually and in a thin and even stream, a rowof auxiliary teeth 9 is provided parts are of any to the concave.

Serial No. 714,475. (No model.)

in front of the threshing-teeth at the entrance These teeth g arearranged at a short distance in advance of the threshin g -teeth of theconcave and so that the grain strikes against them and is retardedbythem at intervals across the cylinder before being seized by the teethof the cylinder. The teeth 9 have no threshing action, as their frontedges are Wholly in advance of the path of travel of the cylinder-teeth.The teeth g differ from the threshing teeth in being broader and inhaving beveled cutting edges 9' at their tops. These beveled top edgespermit the cylinder-teeth to press the straw downward into engagementwith the threshing-teeth of the concave without shock. The concave ispreferably provided with a com verging entrance 3, and the teeth 9 arearranged in this entrance so that the threshingteeth of the cylinderwill come between them and downwardly toward their top edges.

The teeth 9 may be supported by the front bar 0 of the concave when thefront bar is supported at an angle to the periphery of the cylinder, asshown in Fig. 1. The upper flange h of each bearer is substantiallyconcentric with the cylinder throughout its length, and the lower flange2' is parallel with the upper flange for the greater portion of itslength and has a front portion 2', arranged at an angle to the peripheryof the cylinder. The front bar a of the concave rests on the portions 71and is secured by wedge-shaped keys j, bolted to the bearers, so thatthe bar cannot rise.

In the modification shown in Fig. 3 the retarding-teeth g are bolted tothe lower part of the grate f at the entrance to the concave instead ofbeing secured to the front bar of the concave, and their operation isthe same as hereinbefore described.

What I claim is 1. The combinatiomwith a threshing-cylinder, of concavebearers provided with flanges having diverging portions at their frontends, toothed bars supported by the said flanges, and wedges forsecuring the front bar between the said diverging front portions of theflanges, substantially as set forth.

2. The combination, with a cylinder pro vided with threshing-teeth, ofconcave-bearers provided with upper flanges arranged sub stantiallyconcentric with the cylinder, and the said front bar from rising,substantially 10 lower flanges having rear portions parallel as setforth.

with the upper flanges and front portions ar- In testimony whereof Iafiix my signature ranged at an angle to said1 rear portions, ooninpresence of two witnesses.

5 cave-bars provided with t reshing-teeth and J 1 carried by the rearportions of the said lower ABRAHAM I RICE flanges, a front bar providedwith retarding- Witnesses: teeth and carried by the front portions ofthe D. M. RUSSELL, said lower flanges, and wedges for preventing ALF N.RUSSELL.

